Steps for re-tightening bolts under pressure

2021-09-14View Original

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The pre-tightening of flange bolts is generally carried out in a step-by-step diagonal manner (30% → 60% → 100%), after which they are tightened to 100% in a clockwise direction. Are there any standard specifications that outline the steps for retightening flange bolts during operational conditions? Especially in the case of minor leaks, should one tighten each bolt 100% in a clockwise manner directly, or proceed step by step? Welcome to your guidance; thank you

Reply #22021-09-14

Can’t be separated! It’s difficult to solve problems in just one step

Reply #32021-09-14

“\"Tighten bolts under pressure?\" in the steps for re-tightening bolts under pressure ? ? Is it safe? ? ?

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Steps for re-tightening bolts under pressure

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